What's a Daddy?

Sharon and Dave keep on telling me that I'm a Daddy. I'm not sure but I think it might have something to do with those little things that Lodi has. I'm not allowed to get to close to them, but they have let me sniff them. They smell funny! And some times when Lodi is a sleep I lick one or two of them just like she does. I kinda wish Lodi would play with me again, I bring her and those little things the ball, but they don't want to play.